lucene-java-user mailing list archives

Pasha Bizhan wrote:
> Hi,
>
>> From: Daniel Noll [mailto:daniel@nuix.com.au]
>
>> I don't know how this will be for efficiency. If you did it
>> that way, you would have to re-open the index for every
>> single document you add, otherwise you might miss a duplicate
>> which was added recently.
>
> You do not need to reopen index for every single document if the new
> data doesn't contain dupes.
True, I didn't think about that. Our new data always contains dupes as
the data comes in enormous quantities. And because it comes in enormous
quantities, we can't just resolve the duplicates of all the new data on
the fly, so we store off all the hashes for later.
Another way to do it would be to open a reader on the text index but
also keep a local copy of the most recently added hashes. Every 1000 or
however many documents you could reopen the index and clear your local
hashset (I've been thinking about this a little lately as hitting the
text index to find a match is quicker than hitting the database, but in
all honesty creating the hash takes a lot longer for us.)
Daniel
--
Daniel Noll
Nuix Australia Pty Ltd
Suite 79, 89 Jones St, Ultimo NSW 2007, Australia
Phone: (02) 9280 0699
Fax: (02) 9212 6902
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